tonight in boston there is optimism. hope, anxiousness. preparation for what could be a very late night that could spill in tomorrow or beyond. megyn, bret? >> thank you. >> bret: now to chief white house correspondent ed henry in chicago. sned >> good evening, bret. last night, the obama camp was predicting a blow-out. we got off the phone with the senior advisors saying they have to admit florida, virginia, and slew of battlegrounds are too close to call. >> president obama tried to displace calm and confidence today -- >> i expect we will have a good night. >> it was clear last night the magnitude of the moment set in. as he waits to find out whether he will secure his place in history as a transformational president or mere one-term wonder. >> he said yes, we can. and we did. >> in the freezing cold in iowa where it all started for him, a tear was visibly running down his face. he admitted today it was probably from a mix of frigid weather and nostalgia of it all. >> i have to stay that being back in des moines, thinking about all the